Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1979-02-05
1980-02-26
Caroff, Marc L.
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 28, 252 83, B08B 308
Patent
active
041904630
ABSTRACT:
Iron oxide deposits which are found on heat transfer surfaces can be removed by first contacting these deposits with an aqueous solution of a hydrolyzable tanning extract such as sumach, valonea, or chestnut tannin which conditions the deposits and forms a complex thereof. The thus-formed complex is subsequently removed by treatment with dilute solutions of citric acid.
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Caroff Marc L.
Miller Robert A.
Nalco Chemical Company
Premo John G.
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